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(No Model.) 2 Sheets-Sheet 1.

W. WALTHER.

SUGAR OREAMING AND MIXING MACHINE.

No. 399,100. Patented Mar. 5, 1889 6% m I @Wk WW (No Model.) 2 Sheets Sheet 2 W. WALTHER.

SUGAR GRBAMING AND MIXING MACHINE.

Patented Mar. 5, 1889.

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\YlIILlAlI \YAIQ'IIIER, OF Xl ld' YORK, N. Y.

SUGAR CREAMlNG AND MIXING MACHINE.

SPECIFICATION forming part of Letters Patent No. 399,100, dated March 5, 1889.

Application filed August 27, 1888. Serial No. 283,854. (No model.)

1'0 (6 whom it may concern:

Be itlznown that l, \YILLI.=\n WALTI-IER, of the city, county, and State of New York, have invented certain new and useful improvements in Sugar Crcaming and Mixing Machines; and. I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, making a part of this specification, in which Figure 1 is an elevation in perspective of my improved sugar-creaming machine. Fig. 2, a bottom view thereof; Fig. 3, a central vertical or diametric Section through the standards of the machine; and Fig. 4, a sectional detail, on an enlarged scale, in line .r 00 of Fig. 2.

Similar letters indicate like parts in all. of the figures.

The object of my invention is to prevent automatically a breaking strain upon the gearing by which the scrapers are operated when the spindle has been carried to the end of its upward or downward movement, and to prevent a waste of the sugar over the edges of the pan during the movement of the scrapers or stirrers without increasing the ultimate labor required in discharging the contents of the pan or the facility for cooling the same by currents of air passing over it.

My invention consists in the combination and arrangement of mechanism, hereinafter fully described and claimed, whcrebythesc objects are attained.

In the accompanying drawings, A A are I vertical standards, by means whereof the cooling and mixing pan and the driving-gear for operating the scraping-blades are supported.

The pan B is of the customary circular form, and is provided, as usual, with a double bottom, a a, (see Fig. 3,) to permit of a circulation of water under it, and with a central opening, C, toward which the floor of the pan inclines, to facilitate washin g and cleansing it and the discharge of its liquid contents. The circular wall of the pan is fitted with a movable outer rim, D, adapted to drop to the level of the inner rim, and to be elevated so as to form an upward extension thereof, as shown in Fig. 3 and in dotted lines, Fig. l. This movable rim l) is secured at diametrically opposite points to rods ll l), 3,) fitted within the standards A A, whose lower ends are made tubular to receive the rods, and slotted to admit of the longitudinz'tl play of the connecting lugs or oiisetscr, by means whereof the rim and rods are connected. The rods are likewise connectml at points below the pan by means of pinsd (I,1n-ojeeiingfrom the rods through longitudinal slots in the standards to links F F, pivoted to the ends of arms G G, (see Fig. 4,) extending from a rockshaft, H, suspended in hangers l I, depending from the under side of the pan. (See Figs.

.1 and 3.) A central arm, 11, projecting from the rock-shaft ll, is pivoted to a nut, J, upon the end of a screw, K, mounted horizontally under the pan, and which terminates in a spindle, K. This spindle rotates in a suitable bearing in one of two legs, L, placed under the rim of the pan intermediate the standards A A, and is fitted at its outer end with a crank or hand wheel, H. By rotating the screw K and thereby moving the nut J backward or forward along the length thereof the shaft His turned or oscillated, so as to elevate or depress the arms G G, and thereby raise or lower the movable rim I).

The scraping-blades N N are secured in the customary manner upon horizontal arms 0 O, projecting in a right line from a vertical. spindle, P, threaded for a portion of its length to screw through a nut, Q, the latter being mounted to turn loosely in a crossbar, S, fixed upon the upper ends of the standards A A.

The nut Q is normally held to prevent its rotation in the cross-bar by means of a horizontal spring-actuated pawl-rod, T, supported ure of the pawl-rod against the ratchet under ICQ the action of its spring is sufficient, by reason of frictional contact alone, to prevent the nut from turning in the opposite direction unless under abnormal strain, such as will occur when the spindle has carried the scrapers against the bottom of the pan. In such case the pawl will give and allow the nut to revolve as it is carried around by the spindle by reason of the binding of the screw within the nut.

The upper end of the spindle is extended through the hub of a worm-wheel, \V, fitted in a frame, S, over the cross-bar S, so as to play freely longitudinally through said hub, to which it is, however, coupled by means of a spline, c, Fig. 3, working in a longitudinal slot in the spindle.

The worm-wheel \V is geared with a worm,

W, upon a counter-shaft, X, driven by any suitable motive power.

The lower end of the spindle passes, when the spindle is depressed, into the central opening, 0, of the pan and serves to close it.

In theoperation of the machine, when the hot sugar is placed in the pan it is important to cool it as rapidly as possible, and to this end the movable rim 1.) lowered (see Fig. 1) so as to freely expose the surface of the sugar to the action of the air, while the pan itself is cooled by a circulation of cold water through the water-space in the double bot tom a a thereof. So soon as the sugar begins to harden the spindle is made to revolve by means of the worm-wheel W, and as the nut Q, through which the threaded portion of the spindle passes, is held by the pressure of the rod T against the periphery of its ratchet U the spindle is slowly fed downward in its revolution, so as to cause the blades N N to scrape or shave off a thin film of the hardened sugar as they sweep over it. To prevent this detached sugar from being thrown out of the pan in the movement of the scrapers, the movable rim D is elevated as the work proceeds, this elevation being effected, as required, by simply turning the hand-wheel M. \Vhen the stirring-blades strike the bottom of the pan, the spindle P is thereby made to,

bind in the nut Q with so much force as to cause the nut to overcome the resistance of the rod T and turn with the spindle, and thereby discontinue the downward feed thereof. Upon reversing the rotation of the spindle P the nut Q will be positively-held by the engagement of the pawl-rod T with the teeth of the ratchet U, so that the spindle will be fed upward. Should thespindle be carried up until its cross-arm looks with the nut, so as to compel the latter to turn with it, the elastic longitudinal play of the pawl-rod will allow it to yield to the pressure of the ratchet against the end ofthe rod, so that a dead-lock will be avoided by the revolution of the nut as it overcomes the resistance of the pawl.

\Vhen the contents of the pan are ready to be removed, the rim D may be lowered to facilitate the discharge.

, I claim as my invention 1. The combination, substantially as herein set forth, in a machine for cooling and creaming sugar, of a double-bottomed pan inclosing a hollow space to contain a cooling medium and having inlet and outlet apertures to promote a circulation therein, a rotating and longitudinally-moving spindle mounted axially above the pan and having a screw formed thereon, a nut engaging said screw, having a ratchet upon its periphery and re volving looselyin a stationary bearing, a pawl engaging said ratchet-scrapers carried by the spindle, a low stationary wall encircling the pan, an outer movable concentric rim encircling said wall, whereby the depth of the pan may be increased or diminished, and mechanism, substantially as described, for actuating said rim.

2. The combination, with the vertical rotating spindle in a sugar-creaming machine, the scrapingblades carried thereby, and

means, substantially as described, for rotat-' ing the spindle, of a screw formed upon said spindle, a nut encircling and engaging said screw and revolving loosely in a stationary bearing, a ratchet encircling the periphery of said nut, and a spring-actuated pawl en gaging said ratchet, substantially in the manner and for the purpose herein set forth.

3. The combination, substantially as set forth, with the rotating spindle in a sugarcreaming machine, scraping-blades carried thereby, and the pan in which said blades revolve, of a fixed low encircling rim, a concentric movable extension-rim telescoping with said fixed rim, and means, substantially as described, for raising and lowering said extension-rim, substantially in the manner and for the purpose herein set forth.

4. The combination, with the movable rim encircling the pan in a sugar-creaming machine, of the vertical standards, the guiderods playing in said standards and attached to the rim, the horizontal rock-shaft mounted in bearings under the pan, the lifting-arms projecting from said rock-shaftand linked to the guide-rods, the main. arm projecting from the rock-shaft at an angle with said liftingarms, the nut pivoted to said main arm, and the horizontal screw-shaft rotating in bearings under the pan and engaging said nut, all substantially in the manner and for the purpose herein set forth. I

In testimony whereof I have signed'my name to this specification in the presence of two subscribing witnesses.

W. WAL'IHER.

lVitnesses:

A. N. JEsBERA, E. M. \VATSON. 

